Spring sash control



S. L. MARKHAM.

SPRING SASH CONTROL.

APPLICATION FILED NOV. 5. ms

Patented Oct. 14;, 1.919.

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SPRING SASH CONTROL.

' APPLICATION FILED NOV. 5. 1918. 1,318,573. Patented Oct.14,1919.

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SPRING SASH CONTROL.

APPLlCATION FILED Nov. 5. \91s.

1,318,573. Patented Oct. 1%,1919.

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SIDNEY 1.. MARKHAM, or mmns'rown', New Yoax.

SPRING- SASH CONTROL.

Specification of Letters Patent.

Patented Oct. 14, 1919.

Application filed November 5, 1918. Serial No. 261,277.

To all whom it may concern:

Be it known that I, SIDNEY L. MARKHAM, a citizen of the United States, residing at the city of Jamestown, in the county of Chautauqua and State of New York, have invented certain new and useful Improvements in Spring Sash Controls, of which the following, taken in connection with the accompanying drawings, is a specification.

The invention relates to devices for raising and lowering sashes; and the improvement consists in providing a crosswise opening in the'sash rail to receive therein a controlling spring on a suitable shaft, and vertical grooves in the outer edges of the sash stiles which have removable covers to form covered ways for combination chain and flexible tape connections between the opposite ends of said shaft and the opposite end of the window frame, provision being made for removably mounting said shaft and the coil spring thereon; and the invention consists in the novel featuresand combinations hereinafter set forth and claimed.

In the drawings, Figure 1 is a vertical sectional view at line 11 in Fig. 3 showing the crosswise shaft with the coil spring mountings thereon and the combination flexible tape and chain connections at each side in elevation. Fig. 2 is a crosswise sectional view at line 22 in Fig. 3 of the window frame and sash with the improvedcontrolling means therein. Fig. 3 is a vertical sectional view of the sash at line 3-3 in Fig. 2 showing the combination chain and flexible tape connection between the cross rail of the window frame and the shaft of the sash balance or control. Fig. 45 is a perspective view of the sash showing the channel covered edge and the chains with connecting rings thereon. Fig. 5 is a vertical sectional view at line 1-1 in Fig. 3 of the lower portion of the sash showing an elevation of the crosswise shaft and the connection between the parts thereof, the coil spring and mountings being shown in section. Fig. 6. is a perspective view of the roller on each end of the two part crosswise shaft for the flexible tapes showing the attaching slotsfor said tape in said roller; and Fig. 7 is an end elevation of said rollershowing the partially closed end with the square opening therein to receive and hold the squared sleeve through which the supporting shaft or bar for the coil spring is inserted; and Fig, 8 is a perspective view of said squared sleeve showing the flanged end for holding said sleeve within the partially closed end of said roller. Fig. 9 is an elevation of the washer which acts as a closure for the end of the opening in the sash at each side, said washer having a squared opening therein to receive the sleeve shown in Fig. 8; and Fig. 10 is a perspective View of a second flanged sleeve received over the sleeve shown in Fig. 8 which second sleeve closely holds the coil sprmg in shape and aids in preventing endwise movement of the shaft. Fig. 11 is a perspect ve view of one portionof said two part shaft and the connecting pin for the two portions showing the hole in the end of said shaft portion for the reception of the connecting pin. Fig. 12 is an elevation of my improved angular coiled spring which Is preferred for my sash control or balance; and Fig. 13 is an endwise elevation of said spring showing the angular shape of the same.

Like characters of reference refer to corresponding parts in the several views.

The numeral 20 designates the window frame which frame is preferably constructed with spring stops 21 in substantially the manner shown in my former Letters Patent No. 1,068,149, hearing date July 22, 1913.

The numeral 22designates the top sash rail, and the numeral 23 the bottom sash rail whichiare connected by the sash stiles 24s and 25. The sash stiles 24.- and 25 each have the similar lengthwise grooves 26 in their outer edge, which grooves 26 are preferably covered by the plates 27, 28 and 29, said covers being made in sections to give access to different portions of the grooves 26 without uncovering theentire groove, the section 28 covering one end and the angular section 29 covering the other. The section 29 has the hole 30 therethrough to receive the connected chain 31 at the end of which is ring 32 which acts as a stop to prevent the chain 31 from dropping through the hole 30.

Each chain 31 is attached preferably by a triangular link 33 to one end of a flexible tape 34, the other end of the tape 34 being attached to a roller 35 by means of a double slot 36 in the end of the cylindrical roller 35 so that the end of the flexible metal tape 34 can be inserted in said slot in loop form thereby attaching the end of the tape firm y to said cylindrical roller.

The cylindrical roller has a partially closed end with an opening 37 to receive therethrough the squared tubular sleeve 38 with its end flanges 39 which prevent the sleeve drawing through the opening 37 thereby providing a quickly assembled knockdown construction for attaching over the end of one of the shaft portions 40 upon which the cylindrical roller 35 is mounted at one end of the groove 26.

An opening 41 is provided "through the sash rail 23 connecting the lower ends of the grooves 26 in the stiles 24 and 25, the outer ends 42 of the opening 41 being enlarged slightly to receive therein the flanged sleeves 43 at each end of the opening 41. A straight sleeve 44 is attached Within each end of the opening 41 to preserve the contour of the same and form a strong stop for the sleeves 43, the flanged sleeve 43 having the squared opening 45 to receive the sleeve 38 therethrough. A washer 46 is also provided adjacent theinner end of the cylinder 35 to close the opening 42 around the shaft 40 and also to hold the cylinder 35 in line upon the sleeves 38 and shaft 40 so that said cylinder 35 cannot slip into the opening 42 and out of line with the tape 34 thereon.

The shaft is preferably made in two parts 40 which are connected by means of the pin 47 in the holes 48 in the opposing inner ends of said shaft portions 40 thereby permitting either of the portions 40 to rotate independent of the other portion. A coil spring 49 is provided on the shaft portions 40 extending onto the inner ends of the squared sleeves 38. An angular coil spring 49, as shown in Figs. 12 and 13, is preferred since the angular shape provides a spring of greater activity than a common cylindrical coil, the angular coil providing a series of alternate angular bends and straight portions which form, as it were, a continuous series of levers and fulcrums throughout the length of the coiled wire, and any stress upon one end of the spring is communicated to the remainder of the spring, the torsional strain at one end being almost simultaneously felt at the opposite end of said spring. Said angular coil spring is the subject of a separate application for Letters Patent.

The sash spring control is assembled by inserting the two shaft portions 40 within the spring 41 and inserting one of said shaft portions within the sleeve 38; the cylindrical roller 35, the washer 46 and sleeve 43 having first been placed upon the sleeve 38. The portions thus assembled ar'e'inserted through the opening '49 in the sashinto correct position and tile other sleeve 38 with its cylindrical roller 35, Washer 46 and sleeve 43 thereon is then pla'ced'upon the other end portion 40 of the shaft, each of the parts being so spaced as to h'old said sh'aft and the cylindrical rollers 35thereonfirmly'in position and in line. The ends of the flexible metal tapes 34 are then inserted into holding engagement with the slots 36 in the cylindrical rollers 35 and the links 33 of the chains 31 are attached to the opposite ends of said flexible tapes 34. The rings 32 on the chains 31 are then engaged in the hooks 50 in the top cross rail 51 of the window frame 20, which hooks 50 are placed to draw in line with the hole 30, grooves 26 and rollers 35 so that the sash 22 may be moved upward and downwardwithin the grooves formed by the stops 21 in the window frame 20. The tapes 34 are attached on the rollers 35 from opposite sides for the opposite ends so as to rotatably move the shaft end portions 40 in opposite directions thereby obtaining a strong and evenly balanced torsional stress on the coil spring 49, which stress is proportioned to the weight of the shaft by the strength of the spring 49. The cover sections 27 28 and 29'are then attached over the grooves 26, the sections 28 admitting to the ends of the shaft portions 40 and the rollers 35 with the tape 34 thereon, and the sections 29 admitting to the opposite end connections f the tapes 34.

It is obvious that my sash control or balance can be used on both the upper and lower sash as usually constructed in a window frame, or it may be used to balance the sidewise movements of a sash, drawing equally well in any direction, being self contained within the window frame and having the means in itself for balancing or controlling the movement of each sash.

' I claim as new 1. In combination with a sash having an opening in a rail thereof, a two-part squared shaft in the opening, inner squared sleeves onthe ends of the shaft having right angular end flanges, outer squared sleeves engaged over the inner sleeves and having right angular end flanges, sleeves within the rail' openings engaging over said outer sleeves and with the end flanges of the latter, the inner ends of the shaft parts being spaced and formed with apertures, a pin extending across the space between said ends of the shaft parts and received in the apertures thereof, a coil spring surrounding the shaft-parts and engaged at its endsover the inner squared sleeves and abutting the inner ends of the outer squared sleeves, washers for closing. the ends of the rail opening en gageol over the inner squared sleeves, hollow rollers engaged over the inner squared sleeves and receiving the flanges of the latter on their interiors, the inner ends of the hollow rollers abutting the washers, and

flexible-suspension tapes connected to the rollers. I

2. In combination with a sash having an opening in a rail thereof, a two-part shaft having the" inner ends of said parts arranged in spaced relation and formed with openings, a pin rotatably mounted at its ends in said openings, rollers 011 the ends of the shaft-parts, suspension tapes connected to the rollers, a coil spring mounted on the shaft extending across and over the space between the shaft-parts, and means for rotatably mounting the shaft-parts in said rail opening.

3. In combination with a sash having an opening in a rail thereof, a two-part squared shaft in the opening, inner squared sleeves on the ends of the shaft having right angular end flanges, outer squared sleeves engaged over the inner sleeves and having right angular end flanges, sleeves within the rail openings engaging over said outer sleeves and with the end flanges of the lat ter, a coil spring surrounding the shaftparts and engaged at its ends over the inner squared sleeves, washers on the inner squared sleeves for closing the rail openings, hollow rollers engaged over the imier squared sleeves and receiving the flanges 0f the latter on their interiors, and flexible suspension tapes connected to the rollers.

4. In combination with a sash having an opening in a rail thereof, a two-part shaft, sleeves on the shaft-parts having flanged ends, means to mount the sleeves for rotation in the rail opening, a coil spring surrounding the shaft, hollow rollers received over the sleeves and flanges thereof and formed to have interior walls abutting the sleeve flanges, and suspension tapes for the rollers.

5. In a device for raising and lowering sashes, a two-part shaft having the inner ends of the parts spaced, means for mounting said inner ends of the shaft parts, rollers on the outer ends of the shaft parts, suspension tapes connected to the rollers, and a coil spring common to each of the shaft parts and extending across the space between the inner ends thereof.

6. In combination with a sash having an opening in a rail thereof, a spring tensioned shaft in said opening, sleeves on the shaft ends having flanged outer ends, members mounted on the sleeves for closing the ends of the sash opening, suspension tapes, and hollow rollers connected to the suspension tapes, said rollers being engaged over the sleeves and having inner end walls engaged between the flanges of the sleeves and said members.

In testimony whereof I have aflixed my signature in the presence of two witnesses.

SIDNEY L. MARKHAM.

Witnesses:

H. A. SANDBERG, A. W. Kn'rrLn.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. G. 

